Description

We have been developing and testing the new workshop for GOSH2017, called diy-CAD (do-it-yourself Children Aided Design), specifically for the Gär Lämpli project (fermentation lamp). The core idea of the workshop-kit is tool for creative designs of printed circuit boards, introducing basic concepts of Open Hardware being something to re-design for your own use. Going from an open/shared schematic and bill of materials to a manufacturable board, using SMD (surface mount devices) components. The design tool is mostly pen and paper, where the footprint of the parts are scaled 400% and can be freely rearranged, and then a copper layer can be painted to draw the functional board design by hand. This was the first time the kit was tested and i am very thankful for feedback if this is useful at all, or other uses of it.

Information about these parts

Experience from the first workshop at Dimension Plus LAB, TW

Discuss the difference between the "schematic" representation and "physical" implementation

討論示意圖中符號的代表意義與實體物件的整合

Start layouting and drafting the correct connections with pencil

開始用鉛筆畫出正確的連接配置與草稿

we should add some sticky tape to fix them...
建議在smd紙元件的背後加上膠帶或黏土方便固定...

Overlay with a transparency sheet and draw the circuit traces and pads

放上透明膠片，描繪鉛筆的電路與元件連接點

Make sure you take some photo of your layout to refer to the part's position later.
記得幫你排好的元件位置拍照，以免元件不小心挪動位置。

Scan (or photo), scale it back down, print and etch the boards

掃描或拍照，縮小，列印，蝕刻電路板

Take a decent photo, check for reflections from lamps and stuff. Edit the photo in GIMP, to select all surrounding areas and invert the selection. Fill with FG (black), copy, create from clipboard -> new file. import in Inkscape, rescale to original size (some markings on the drawing would be great). Last edits can also be done in inkscape, like adding logos, version numbers, open source coconuts or defined drill holes, cut-layer etc...
如果使用拍照，注意膠片上的反光等，在GIMP影像處理軟體中，全選>反轉選取，填入黑色前景，複製。然後在Inkscape程式，新增一個檔案，從剪貼簿中貼過來之前複製的圖，改變尺寸至原來尺寸，在Inkscape做最後微調，例如增加logo，版本，開源椰子計畫或預計開孔位置，電路層等。

Etch the boards or send it for manufacturing

蝕刻電路板或送至工廠製作

Panel, Print and etch, or use pdf2gerber to send it for manufacturing. A version was imported to kiCAD and Gerber files produced. You can find it on kitnic.
板子，列印與蝕刻或使用pdf2gerber轉檔，送至工廠製作。
新版可輸入至kiCAD，製作出Gerber檔案，你可在此找到。
kitnic.

Workshop at Take-Space, Fablab Hamamatsu, Japan

Designing and making the boards

Preparing the files for Manufacturing

Selected Take's Unagi Version of the GärLämpli (and thx to Nozomi for nice calligraphy!!) and prepared the file in Inkscape to get extra features and make Shenzhen Ready for manufacturing. See a how to here.

Making a Kit

Reflections

I hope more people are picking up the diy-CAD design tool, or also just the kits we developed using it. I think it can have it's special role in education (not as a starting point), fun for geeks/adults, aswell as complete newbies to open hardware & pcb design. The full process gives them an amazing experience from drawing and having first time a pcb made in their hands in one (long) day.

This educational workshop project, specifically with attiny85 audio prog bootloader, is maybe not the most suitable, if its just about creative pcb making, other sound toys, synths and blinke-shit might do the trick. But then on the other side, the audio programmable attiny, also called CocoNEO, is a very powerful low-cost µ-controller science/toy with much broader possible applications, similar to other data-loggers available by publiclab and many others.